%type <struct psi_token **> impl_stmt
%destructor {psi_impl_stmt_free(&$$);} impl_stmt
%type <struct psi_token *> impl_type_token impl_type_restricted_token impl_type_extended_token callback_rval let_func_token set_func_token assert_stmt_token
-%destructor {psi_token_free(&$$);} impl_type_token impl_type_restricted_token impl_type_extended_token callback_rval let_func_token set_func_token assert_stmt_token
+%destructor {} impl_type_token impl_type_restricted_token impl_type_extended_token callback_rval let_func_token set_func_token assert_stmt_token
%type <struct psi_plist *> impl_args impl_stmts let_exps let_func_exps callback_arg_list callback_args set_exps set_func_exps free_exps
%destructor {psi_plist_free($$);} impl_args impl_stmts let_exps let_func_exps callback_arg_list callback_args set_exps set_func_exps free_exps
#if PSI_DEBUG_LEX
PSI_DEBUG_PRINT(P, "PSI: LEX index %4zu ", *index);
#endif
- if (psi_plist_get(tokens, (*index)++, &token)) {
+ if (psi_plist_get(tokens, (*index)++, &token) && token) {
#if PSI_DEBUG_LEX
PSI_DEBUG_DUMP(P, psi_token_dump, token);
#endif